Combined latch and lock.



WILLIAM T. BLOUNT, JR., OF THUNDERBOLT, GEORGIA.

COMBINED LATCH AND LOCK.

Specification of Letters Patent.

Patented April 21, 1908.

Application led. January 16, 1906. Serial No. 296,361.

T o all whom t may concern:

Be it known that I, VILLIAM T. BLOUNT, Jr., a citizen of the UnitedStates, residing at Thunderbolt, in the county of Chatham and State ofGeorgia, have invented new and useful Improvements in Combined Latchesand Locks, of which the following is a specification.

My invention relates to combined locks and latches, and its primaryobject is to provide a device of this character which is 'comparativelysimple of construction, one which is durable and efficient, and onewhich can be manufactured and sold at a low cost.

' lNith the above and other objects in view, the invention consists inthe construction, combination and arrangement of parts hereinafter fullydescribed, claimed and illustrated in the accompanying drawings, where-1n: l

Figure 1 is a central longitudinal sectional view of the latch, and Fig.2 is a detail top plan view of the latch.

Referring to the drawings by reference characters, A designates thelatch casing which is made preferably of two semicircular sections 1-1,the rear ends of the sections being provided with perforated lugs 2through which passes a bolt 3, or other suitable fastening means, whichunites the rear ends of the sections. The front ends of the sections areprovided with downwardly extending and integrally formed projections 4,said projections extending through openings 5 in a face plate 6, and areupset to firmly secure the sections thereto. The projections 4 serve notonly to secure the face plate to the casing A, but also serve to unitethe forward ends of the casing. The face plate is provided with openings7 through which extend screws 8 to secure the casing and face plate inapplied position to a door, said face plate being also provided with alatch bolt opening 9 registering and communicating with the' interior ofthe casing A. Inasmuch as the casing A is circular in crossseetion, itis only necessary to drill a small opening in the door to receive thesame,

whereby the cost of mounting the latch in applied position is reduced tothe minimum, as the time and labor necessary to provide the usualmortise is avoided.

A latch bolt carrying or operating member 10 is slidably mounted withinthe casing A, and is of tubular formation, as is fully illustrated inFig. 1 of the drawings. The

latch bolt 11 is provided with a rearwardly projected shank or stem 12,said shank or stem being provided with a head 13 mounted within themember 10. The forward end of the member 10 is bent downwardly, as at14, to engage over the head 13 to prevent its being withdrawn therefrom.The rear end of the member 1() is provided with a rearwardly disposedarm l5, said arm being cutaway to provide an upwardly inclined workingface 16, and the extremity thereof being curved inwardly over said face16 to provide a stop 17. The member 10 is adapted to be moved rearwardlywithin the casing A by means hereinafter set forth, and the same isretained normally projected by means of a spring 18, said spring havingone end secured tothe rear of the casing A, and its free end disposed inengagement with the rear end of the arm 15. The rearward movement of themember 10 withdraws the latch bolt 11 within the easing A, while itsforward. movement projects the latch bolt 11. In order to retain thelatch bolt 1l projected yieldingly through the opening 9 to permit theclosing ofthe door without moving the said member 10, I mount withinsaid member behind the head 13 an expansion spring 19.

The knob spindle 21 which is mounted in bearings in suitable escutcheonplates (not shown) carries suitable knobs and is preferably rectangularin cross-section. Secured to the knob s indle 21 and projecting into thecasing A t irough an opening 23 therein, and disposed in the cut-awayportion of the arm 15, is a lever 24. The turning of either knob in onedirection will cause the lower end of the lever 24 to move over theworking face 16 of the arm 15 and thereby withdraw the latch bolt 11within the casing A. Vhen the knob is released the spring 1S willproject the latch bolt 11, and the forward movement of the member 10 islimited by the engagement of a lug 26 secured to said member with a stop25 formed on the interior of the casing A. The stop 25 is annular, andalso causes the member 1() to move in a direct line within the easing A,whereby all liability of its failure to properly work is obviated. Theyielding connection between the latch bolt 11 and the member 10 permitsthe former to move within the casing A when its forward end strikt-h akeeper plate when the door is closed without turning the knob spindle21, whereby the closing of the door is rendered. easy and practicallynoiseless.

The latch bolt 1]. is revolubly mounted. within the member l so as topermit of its being reversed to adapt the latch for application to doorsswinging in either direction, the manner in which the latch bolt may bereversed being obvious.

From the foregoing description, taken in connection with theaccompanying drawings, the const-ruction and mode of operation of theinvention will be understood without a further extended description.

Changes in the form, proportions and minor details of construction maybe made i within the scope of the invention without departing from thespirit or `sacrificing any of the advantages thereof.

Having fully described and illustrated my invention, what I claim is:

l. A device of the character set forth, comprising a cylindricalcasing., a tubular member movably mounted within the casing and.provided with a rearwardly and upwardly inclined arm, a latch boltslidably mounted within the casing and movably con*- nected with thetubular member, a spring mounted within the tubular'member behind thelatch bolt, and means for engaging the arm of the tubular memberforwithdrawing' the latch bolt.

'2. A device of the character set forth, comprising a cylindrical casingprovided on its interior with an annular shoulder, a tubular membermovably mounted within the casing and provided with a lug adapted toengage said shoulder, means for retaining the tubular member normallyprojected, a latch bolt slidably mounted within the casing and movablyconnected with the tubular member, and a spring mounted within thetubular member behind the latch bolt.

3. A device of the character set forth, coinprising a cylindrical casingprovided on its interior with an annular shoulder, a tubular membermovably mounted. within the casing and provided with a lug adapted toengage said shoulder, said tubular member being provided with arearwardly disposed arm cut-away to' provide an upwardly inclinedworking face, means for .retaining the tubular member normallyprojected, means for retracting the tubular member, ya latch boltprovided with a shank portion having a head, said head being slidablymounted within the tubular member, and a spring mounted within thetubular member behind said head.

In testimony whereof, I aliX my signature in presen ce of two witnesses.

WILLIAM T. BLOUNT, JR. Ii tnesses GORDON SAUssY, E. M. MoDoNELL.

